/Engine/Source/Runtime/HeadMountedDisplay/Public/IHeadMountedDisplayModule.h
Attempts to create a new head tracking device interface
Interface to the new head tracking device, if we were able to successfully create one
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< class [IXRTrackingSystem](API\Runtime\HeadMountedDisplay\IXRTrackingSystem), ESPMode::ThreadSafe > CreateTrackingSystem()